Whether you're more acquainted with the pesty plant or Batman's wiley nemesis, you probably know to stay away from anything by the name of Poison Ivy. In today's Skincast episode, hosts Luke Johnson, MD and Michelle Tarbox, MD explain why our skin reacts to poison ivy and poison oak, how to treat the rashes they cause, and what other types of plants you'll want to steer clear of (*cough* Giant Hogweed *cough*).